21000545288

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{257}}^1\times {\mathrm{293}}^1\times {\mathrm{491}}^1$

素因数の和:1118

約数の個数: 64

約数和(自身を含む): 40304718720

約数和(自身を除く): 19304173432

約数列:

[1, 2, 4, 8, 71, 142, 257, 284, 293, 491, 514, 568, 586, 982, 1028, 1172, 1964, 2056, 2344, 3928, 18247, 20803, 34861, 36494, 41606, 69722, 72988, 75301, 83212, 126187, 139444, 143863, 145976, 150602, 166424, 252374, 278888, 287726, 301204, 504748, 575452, 602408, 1009496, 1150904, 5346371, 8959277, 10214273, 10692742, 17918554, 20428546, 21385484, 35837108, 36972791, 40857092, 42770968, 71674216, 73945582, 81714184, 147891164, 295782328, 2625068161, 5250136322, 10500272644, 21000545288]

約数ペア:

[(1, 21000545288), (2, 10500272644), (4, 5250136322), (8, 2625068161), (71, 295782328), (142, 147891164), (257, 81714184), (284, 73945582), (293, 71674216), (491, 42770968), (514, 40857092), (568, 36972791), (586, 35837108), (982, 21385484), (1028, 20428546), (1172, 17918554), (1964, 10692742), (2056, 10214273), (2344, 8959277), (3928, 5346371), (18247, 1150904), (20803, 1009496), (34861, 602408), (36494, 575452), (41606, 504748), (69722, 301204), (72988, 287726), (75301, 278888), (83212, 252374), (126187, 166424), (139444, 150602), (143863, 145976)]